feat: add label preview functionality to barcode templates with backend rendering and UI modal

2026-05-07 23:52:39 +02:00
parent 71502df7b4
commit 71b447154d
4 changed files with 107 additions and 4 deletions
@@ -24,6 +24,19 @@ import { LabelPrintAgentService } from './label-print-agent.service';
 export class LabelPrintAgentController {
  constructor(private readonly service: LabelPrintAgentService) {}

+  @Post('preview')
+  @HttpCode(HttpStatus.OK)
+  @RequirePermissions(Permission.VIEW_SCANNER)
+  async preview(
+    @Body() body: { templateId: number; fieldValues?: Record<string, string> },
+    @Res({ passthrough: true }) res: Response,
+  ): Promise<StreamableFile> {
+    const buf = await this.service.renderPreview(body.templateId, body.fieldValues ?? {});
+    const { Readable } = await import('stream');
+    res.setHeader('Content-Type', 'image/png');
+    return new StreamableFile(Readable.from(buf));
+  }
+
  // Manuell einen Job anlegen (Frontend → Backend)
  @Post('jobs')
  @HttpCode(HttpStatus.CREATED)